Gas-relief valve for blast-furnaces.



No. 813,442. PATENTED FEB. 27, 1906. E. L. MESSLBR.

GAS RELIEF VALVE FOR BLAST FURNACES.

APPLICATION FILED NOV. 9 1904.

FIG; 5.

WITNESSES INVENTOR UNITED STATES EUGENE L. MESSLER, OF PITTSBURG,PENNSYLVANIA.

GAS-RELIEF VALVE FOR BLAST-FURNACES.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed November 9,1904. Serial No. 231,998.

and State of Pennsylvania, have invented a new and useful Improvement inGas-Relief Valves for Blast-Furnaces, of which the following is a full,clear, and exact description,

reference being had to the accompanying drawings, forming part of thisspecification, in which Figure 1 is a side elevation of the bleederstackleading from the stack of the furnace, the stack being provided with myimproved relief-valve. Fig. 2 is a vertical sectional view of the upperportion of the valve and the upper portion of the bleeder-stack, andFig. 3 is a plan view of the same.

Like symbols of reference indicate like parts wherever they occur.

The object of my invention is to provide a gas-relief valve forblast-furnaces which shall permit the relief or escape of the gas whenit is so desired and shall under other circumstances so close thebleeder-stack as to prevent the escape of dirt and gases. Inblastfurnace practice it is customary to conduct the gases produced bycombustion of fuel in a blast-furnace stack from the stack by a suitablebleeder-oonduit to the boilers or other place where these gases are usedas fuel. When, however, the gases are not being so used or when there isan excessive supply of such gases, it is necessary that the gases may beallowed to escape. Heretofore the valve which has controlled theretention and escape of these gases has been of such construction as toopen upwardly from its seat and permit of the leakage of gases and theescape of ore-dust and other dirt during the charging of theblast-furnace, and this leakage and escape of dirt and dust has been incertain cases so great as to cause excessive annoyance to the communitywithin which the blast-furnace was situate and to constitute a nuisance.

My invention consists in an improved valvelocated in the bleeder-conduitand adapted to perfectly seal the escape-opening through which thefurnace is relieved by per mitting the escape of gas, and to be easilyopened or closed whenever it becomes de sirable or necessary so to do.

I Will now describe my invention so that others skilled in the art towhich it appertains may manufacture and use the same.

In the drawings, 2 represents the stack of the furnace; 3, thebleeder-conduit opening from the top of the furnace-stack and leadingvertically to a point above the same. At the top of the bleeder-conduit3 is a cover 4, provided with a valve-seat 5, which is bolted around anopening in the cover. the top of the conduit 3 and adapted to seat onits upward movement against thevalveseat 5 is a bell-shaped valve 6.Extending from the apex of the valve 6 is a short link 7, pivoted to thevalve and also pivoted to the lever-arm 8, which arm is pivoted to thestandard 9. Extending from the two ends of the lever-arm 8 are thechains 10, which extend downwardly to the point of access by the workmenand by means of which the valve 6 is caused to open or close to permitthe relief of the stack by the escape of gases through the valve-openingor to confine the gases, dirt, and ore-dust within the bleederconduit 3during the period the gas is being used under the boilers and during theperiod when the oredust would be liable to escape in injuriousquantities through the valveopening.

The advantages of my improvement will be appreciated by those skilled inthe art. No matter how great the pressure of gas may be within thefurnace and within the bleederconduit 3 it serves merely to more tightlypress the valve 6 against the seat 5. At the same time the valve iseasily and quickly operated to permit the relief of the furnace by theescape of the gases.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In combination, a ble eder-conduit leading from the upper portion ofa blast-furnace, a valve-seat arranged in said conduit, and a valveadapted to move upwardly toward its seat in the direction of thepressure of the gases in the bleeder-conduit, substantially asdescribed.

2. In combination, a bleeder-conduit leading from the upper portion of ablast-furnace, a valve-seat at the top of said conduit, a bellvalveadapted to seat upwardly against said valve-seat in the direction of thepressure of the gases in the bleeder-conduit, and an operatingleverconnected to,the valve, substantially as described.

3. In combination, a bleeder-conduit leading from the upper portion of ablast-furnace,

Situate at v a valve-seat at the top of said conduit, a bell- ,nected tothe ends of said lever, substantially 16 valve adapted to seat upwardlvagainst said as described.

valve-seat in the direction of the pressure of In testimony whereof Ihave hereunto set the gases1 inftlie bleledenelonduit, a stgindaid myhand.

at one s1 e o t eva ve, a ever ivote to t e valve and to said standardand extending be- EUGENE MESSLER' yond the valve at one end and beyondthe Witnesses:

standard at the other end, and operating- HENRY H. DOYLE,

chains for opening and closing the valve con- WALTER FAMARISS.

